Summary of Significant Accounting Policies - Services Provided to Marketing Funds by REMAX Franchising (Details) - Marketing funds - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Costs charged	$ 2,610		$ 4,742	$ 7,720	$ 16,327
Work in progress assets
Costs charged	300	$ 200
Technology - operating
Costs charged	1,169		3,526	3,507	11,269
Technology - capital
Costs charged			(277)	(203)	884
Marketing staff and administrative services
Costs charged	$ 1,441		$ 1,493	$ 4,416	$ 4,174